The drama is great aside from slow pace of the series and some unusual cut editing they aired. The main leads was awesome. And I have some few complain and it's all about the last episode which kinda messed/mixed up.
After I re-watched the drama, mostly at ending part (Ep.24), I think it is the sad ending. The female lead, He-Ran died at the snow and lake scene. Others who've watched it thinks she recovered when she went to America for treatment with her mother but it did not happen. Because at the lake scene part, He-Ran told Xiao Han that she's not leaving and wanted to stay with Xiao Han's side 'til the end. The two lay down on the snow, He-Ran told Xiao Han about the things that he promised to her were all fulfilled and she really love him. After that He-Ran said that she feels a bit tired and wanted to sleep for awhile, I think that's the signal that she was about to pass away that's why Xiao Han cried after that.

Now there's a scene after the credit roll, that they've met again after a year. For what I think, it is Xiao Han's memories of her that she will be forever alive in his heart and mind, and his last woman as he promised.

But there's a contradiction to the story. The mother said, she will do what her daughter He-Ran request that she should start a new life BUT only if she will go for a treatment in America with her and recovered. And in 1year, the mother reunited with her love interest and agrees to start living with him. And the people around them acting like nothing happen about He-Ran. Like what the hell happen and which is which is real? it confuse me. hahhaah